Retroflexing Needle Suture Retrieval for Perforation Closure
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Solution Overview
Problem
Existing medical devices for endoscopically suturing perforations are complex, costly, and time-consuming due to their numerous moving parts, making tissue orientation and suture placement complicated for medical professionals.
Innovation Solution
A medical system comprising an endoscope, an endcap, an elongated side tube, a needle with a retroflexing tip, and a retrieval device that allows for simple and controlled suture placement around a perforation, using a needle that can be translated through a side channel and a retrieval device that engages and detaches from the needle tip for suture retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If complex medical devices with numerous moving parts are used for tissue orientation and suturing, then tissue orientation capability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The device is divided into distinct functional modules: a grasper for tissue capture, a suture delivery mechanism, and a cutting element. Each module operates independently but coordinates with others to achieve complex tissue manipulation tasks, reducing overall system complexity while maintaining versatility
Solution Approach 2:
The medical device performs multiple functions including tissue grasping, suture delivery, tissue cutting, and orientation using a single integrated platform. The grasper can both capture and orient tissue, while the suture mechanism can both deliver and secure sutures, eliminating the need for separate specialized devices
2Manufacturing precision
If medical devices with numerous moving parts are used for suturing, then suture placement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The grasper captures and orients the tissue in the desired position before suture delivery begins. The suture is pre-loaded into the delivery mechanism, and the needle is pre-positioned, allowing the physician to simply activate the sequence without complex manual manipulation during the critical suture placement phase
Solution Approach 2:
The device automatically advances the suture through the tissue once activated, using the mechanical advantage of the grasper's closing force and the needle's penetration motion to pull the suture through without requiring the physician to manually guide each movement, thereby maintaining precision while simplifying operation
3Reliability
If complex medical devices are used for perforation closure, then closure reliability is improved, but procedure time increases
Solution Approach 1:
The device performs tissue grasping, suture delivery, knot tying, and cutting in a continuous sequence without requiring device repositioning or reconfiguration between steps. The grasper maintains tissue hold throughout the entire suture placement process, and the suture mechanism continuously advances the needle and suture material through the tissue in one uninterrupted motion
Solution Approach 2:
Multiple functions that would traditionally require separate devices or sequential steps are merged into a single integrated action: the grasper simultaneously captures and orients tissue while the suture mechanism delivers and secures the suture in one coordinated motion, eliminating transition times between operations
Data Source
AI summary
Medical systems, devices and methods are disclosed for suturing a perforation in tissue, that may be employed endoscopically and/or laparoscopically, and that offer simple, reliable and controllable placement of sutures around a perforation for complete closure thereof. One embodiment of the medical system generally includes an endoscope, an endcap, an elongated side tube, a needle, a suture and a retrieval device. The endcap is fitted to a distal end of the endoscope. The elongated side tube defines a side channel and is connected to the endcap. The needle has a shaft and a needle tip detachably connected to a distal end of the shaft. The needle is sized to be translated through the side channel of the side tube. The suture is attached to the needle tip. The retrieval device is sized to be translated through a working channel of the endoscope and retrieve the needle tip.